I wana know is it something related to heart I mean feeling nausea head spinning, low blood pressure? Wht these all indicates

hard to say. Head spinning ; nausea could certainly be due to low BP but could be due to other things as well. Do you for sure have low bp? If so, do you have fever? If so, it is potentially more serious and should be addressed by a doctor soon. Without fever, consider: vertigo - a spinning feeling with nausea due to inner ear inflammation or infection. Do you have hearing loss and/or buzzing in 1 ear?